Dold Voltage Monitoring Relay With SPDT Contacts, 24 V dc

  • RS Stock No. 240-9049
  • Mfr. Part No. AI898 DC24V 6kOhm UH=AC45-400Hz 230V
  • Manufacturer Dold
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): DE
Product Details

Insulation monitor for direct current networks, AI898

Fixed response time 6 kΩ
LED display for operational readiness and earth fault
1 changeover
Overall width 45 mm

The AI898 insulation monitor displays the insulation resistance of unearthed direct current networks to earth. It does not detect symmetrical earth faults. In practice, these faults are generally insignificant.
The AI898 works on the quiescent current principle, for example when the auxiliary voltage is applied to terminals A1 → A2 the output relay is activated and the "ON" LED indicates that the insulation resistance RAN is not less than the minimum value. If insulation resistance falls below the response value, the output relay drops, the "ON" LED goes out and the second LED for "Earth fault" lights up.
A bridge between terminals LT1 and LT2 (inserted as standard) allows the AI898 to be programmed for memory storage behaviour; remove the bridge to programme hysteresis behaviour. The bridge can be replaced with a delete key with an NC contact. A test key (PT) tests the functional efficiency of the device (as per VDE 0435).

Attribute Value
Monitoring Application Voltage
Supply Voltage 24 V dc
Contact Configuration SPDT
Voltage Sensing Range 0.8 → 1.1
Time Delay 0.4 s
Width 45mm
Length 115mm
Operating Temperature Range -20 → +60 °C
Maximum Operating Temperature +60°C
Height 77mm
Dimensions 115 x 45 x 77 mm
Minimum Operating Temperature -20°C
2 In Global stock for delivery within 4 - 6 working days
Price Each
MYR 1,554.38
Per unit
1 +
Related Products
This relay acts as a safety device in ...
This relay acts as a safety device in gas-heated residential housing, by controlling the boiler and the stale air extraction system.Red indicator light on front panel indicates an air extraction fault.Connection by cage terminals.
Senses pulses from a proximity detector mounted near ...
Senses pulses from a proximity detector mounted near a machine shaft rotating at up to 10000rpmLED indication of relay status and supplyDIN standard case, which may be front panel or chassis mounted (11-pin socket 403-869)Additional fail safe with time delay ...
TELE VEO series AC and DC voltage monitoring ...
TELE VEO series AC and DC voltage monitoring relay. Multifunction monitoring in a slim easy to use package. The VEO series have a self-extinguishing plastic body with an IP rating of IP40. DIN Rail mountLED indicatorScrew terminals1 change over contactMultifunction. ...
The MK9052 motor protection relay is used to ...
The MK9052 motor protection relay is used to prevent thermal overloads in motors (for example as caused by high switching frequencies, heavy start-up loads, single phase operation, interrupted cooling, high ambient temperature).Special thermistors (PTC resistors) developed specifically for motor protection ...